package NowCoder.UnderlyingPrinciple;

public class 单选_5_6_10 {
    public String str = "6";

    public void change(String str){
        str = "10";
    }

    public static void main(String[] args) {
        单选_5_6_10 n1 = new 单选_5_6_10();
        n1.change(n1.str);
        System.out.println(n1.str);
    }
}
